Ch. 23, Geology and Dating Quiz

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Geology basics test

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Tania Hurlbutt

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Ch. 23, Geology and Dating Quiz


Ch. 23, Geology and Dating QuizVersión en línea Geology basics test por Tania Hurlbutt 1 1. The study of the layers of sedimentary rock is called: a b) superposition b c) stratigraphy c d) paleogeography d a) radiometry 2 2. There are 1,000 carbon-14 atoms in a bone. After two half-lives (11,136 years), how many carbon-14 atoms will remain? a b) 750 b a) 500 c d) 100 d c) 250 3 3. Tree rings can tell: a a) about rainfall in an area b d) all of the above c b) the time between good and bad growing years d c) the age of the tree 4 4. Carbon-14 is used to date: a b) sedimentary rock b a) igneous rock c c) metamorphic rock d d) fossilized organisms 5 5. Potassium-40 is used to get a relative date for: a d) shells on a beach b c) metamorphic rocks c a) dinosaur fossils d b) woolly mammoths 6 6. Half-life measures: a d) how long it takes carbon to turn into nitrogen b a) half the lifetime of carbon atoms c b) 5,568 years d c) the time it takes half the radioactive atoms to turn into stable atoms 7 7. The order of rock layers indicates: a d) the relative age of the layers b a) the absolute age of the layers c b) what kind of rock the layer is d c) where the layers were deposited 8 8. The Principle of Superposition states that: a a) the oldest layer of rock is at the bottom and the youngest is at the top b b) the youngest layer is at the bottom and the oldest is at the top c d) layers can be used to give an absolute date d c) all layers are the same age 9 9. Atoms of the same element with different numbers of neutrons are called: a c) isotopes b d) radioactive particles c a) ions d b) molecules 10 10. Which isotope of carbon is used for radiometric dating? a d) carbon-13 b a) carbon-12 c c) carbon-14 d b) carbon-11 11 11. Carbon-14 decays into which stable isotope? a a) carbon-12 b d) nitrogen-14 c b) phosphorus-40 d c) oxygen-16 12 12. An igneous rock layer cuts through sedimentary rock layers and is dated at 65 million years old. What is the minimum age of the top sedimentary layer? a d) sedimentary rock cannot be dated b c) 4.5 billion years old c b) more than 65 million years old d a) less than 65 million years old

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Ch. 23, Geology and Dating Quiz

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Ch. 23, Geology and Dating QuizVersión en línea

por Tania Hurlbutt

1. The study of the layers of sedimentary rock is called:

2. There are 1,000 carbon-14 atoms in a bone. After two half-lives (11,136 years), how many carbon-14 atoms will remain?

3. Tree rings can tell:

4. Carbon-14 is used to date:

5. Potassium-40 is used to get a relative date for:

6. Half-life measures:

7. The order of rock layers indicates:

8. The Principle of Superposition states that:

9. Atoms of the same element with different numbers of neutrons are called:

10. Which isotope of carbon is used for radiometric dating?

11. Carbon-14 decays into which stable isotope?

12. An igneous rock layer cuts through sedimentary rock layers and is dated at 65 million years old. What is the minimum age of the top sedimentary layer?